An overview of WFIRST/AFTA coronagraph optical modeling

The WFIRST/AFTA 2.4 m space telescope currently under study includes a stellar coronagraph for the imaging and spectral characterization of extrasolar planets. Based largely on performance predictions from end-to-end optical propagation modeling, promising coronagraphic methods were selected in late 2013 for further consideration for use on AFTA. Since those downselect analyses further modeling work has been done on evaluating refined coronagraph designs, wavefront sensing and control, detector representation, and time-dependent effects. Thermal, structural, ray trace, and diffraction propagation models are used in these studies. Presented here is the progress to date and plans for future analyses.

[1]  Amir Give'on,et al.  Broadband wavefront correction algorithm for high-contrast imaging systems , 2007, SPIE Optical Engineering + Applications.

[2]  John E. Krist.  End-to-end numerical modeling of AFTA coronagraphs , 2014, Astronomical Telescopes and Instrumentation.

[3]  David M. Shemo,et al.  Optical Vectorial Vortex Coronagraphs using Liquid Crystal Polymers: theory, manufacturing and laboratory demonstration. , 2009, Optics express.

[4]  R. Soummer,et al.  DETECTION AND CHARACTERIZATION OF EXOPLANETS AND DISKS USING PROJECTIONS ON KARHUNEN–LOÈVE EIGENIMAGES , 2012, 1207.4197.

[5]  Dwight Moody,et al.  Complex apodized Lyot coronagraph for exoplanet imaging with partially obscured telescope apertures , 2013, Optics & Photonics - Optical Engineering + Applications.

[6]  Alexis Carlotti,et al.  Shaped pupil coronagraphy with WFIRST-AFTA , 2013, Optics & Photonics - Optical Engineering + Applications.

[7]  J. Green,et al.  Reflectivity and optical surface height requirements in a broadband coronagraph. 1. Contrast floor due to controllable spatial frequencies. , 2006, Applied optics.

[8]  Mark Clampin,et al.  Phase-Occultation Nulling Coronagraphy , 2015 .

[9]  Edward J. Wollack,et al.  Wide-Field InfraRed Survey Telescope-Astrophysics Focused Telescope Assets WFIRST-AFTA Final Report , 2013, 1305.5422.

[10]  M. Shao,et al.  DAVINCI, a diluter aperture visible nulling coronagraphic instrument , 2008, Astronomical Telescopes + Instrumentation.

[11]  R. Soummer,et al.  HIGH PERFORMANCE PIAA CORONAGRAPHY WITH COMPLEX AMPLITUDE FOCAL PLANE MASKS , 2010 .

[12]  Amir Give'on,et al.  Pair-wise, deformable mirror, image plane-based diversity electric field estimation for high contrast coronagraphy , 2011, Optical Engineering + Applications.